Fix "hy -c CMD" to show lex errors; add tests

* tells you there's a lex error, but doesn't tell you much else
* adds tests for all new bin/hy functionality

hy/cmdline.py

@@ -37,7 +37,7 @@ from hy.lex.states import Idle, LexException
 from hy.lex.machine import Machine
 from hy.compiler import hy_compile
 from hy.core import process
-from hy.importer import ast_compile
+from hy.importer import ast_compile, import_buffer_to_module
 
 import hy.completer
 
@@ -137,8 +137,13 @@ def ideas_macro(tree):
 
 
 def run_command(source):
-    hr = HyREPL()
-    hr.runsource(source, filename='<input>', symbol='single')
+    try:
+        import_buffer_to_module("__main__", source)
+    except LexException as exc:
+        # TODO: This would be better if we had line, col info.
+        print(source)
+        print(repr(exc))
+        return 1
     return 0
 
 

tests/test_bin.py

@@ -1,8 +1,44 @@
 import subprocess
 
 
-def test_bin_hy():
-    p = subprocess.Popen("echo | bin/hy",
+def run_cmd(cmd):
+    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                          shell=True)
     p.wait()
-    assert p.returncode == 0
+    return p.returncode, p.stdout, p.stderr
+
+
+def test_bin_hy():
+    ret = run_cmd("echo | bin/hy")
+    assert ret[0] == 0
+
+
+def test_bin_hy_stdin():
+    ret = run_cmd("echo \"(koan)\" | bin/hy")
+    assert ret[0] == 0
+    assert "monk" in ret[1].read().decode("utf-8")
+
+
+def test_bin_hy_cmd():
+    ret = run_cmd("bin/hy -c \"(koan)\"")
+    assert ret[0] == 0
+    assert "monk" in ret[1].read().decode("utf-8")
+
+    ret = run_cmd("bin/hy -c \"(koan\"")
+    assert ret[0] == 1
+    assert "LexException" in ret[1].read().decode("utf-8")
+
+
+def test_bin_hy_icmd():
+    ret = run_cmd("echo \"(ideas)\" | bin/hy -i \"(koan)\"")
+    assert ret[0] == 0
+    output = ret[1].read().decode("utf-8")
+
+    assert "monk" in output
+    assert "figlet" in output
+
+
+def test_bin_hy_file():
+    ret = run_cmd("bin/hy eg/nonfree/halting-problem/halting.hy")
+    assert ret[0] == 0
+    assert "27" in ret[1].read().decode("utf-8")